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Cornerstone Jul 1 - 7 25 questions
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Monday 1 July 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 7⁄8 + 1⁄5

    Answer: 43⁄40
  2. 2. Algebra

    Solve: 4x - 11 = 5

    Answer: x = 4
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio

    Share 32 in the ratio 3:1

    Answer: 24 and 8
  5. 5. Statistics

    Find the mean of: 9, 7, 20

    Answer: 12

Tuesday 2 July 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 3⁄5 + 1⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 5x - 5 = 25

    Answer: x = 6
  3. 3. Geometry

    Calculate the hypotenuse when a = 12cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 14.42cm
  4. 4. Ratio

    Share 60 in the ratio 2:3

    Answer: 24 and 36
  5. 5. Statistics

    Find the mean of: 7, 10, 11, 12, 5

    Answer: 9

Wednesday 3 July 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄6 + 3⁄4

    Answer: 17⁄12
  2. 2. Algebra

    Solve: 5x + 15 = 50

    Answer: x = 7
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio

    Share 90 in the ratio 4:1

    Answer: 72 and 18
  5. 5. Statistics

    Calculate the mean of: 12, 28, 40, 20, 48, 5, 17. Give your answer to 2 decimal places

    Answer: 24.29

Thursday 4 July 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Add: 4⁄7 + 6⁄8

    Answer: 37⁄28
  2. 2. Algebra

    Solve: 7x + 6 = 27

    Answer: x = 3
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Divide 144 in the ratio 1:4:1

    Answer: 24, 96 and 24
  5. 5. Statistics

    Find the mean of: 10, 9, 9, 16

    Answer: 11

Friday 5 July 2013

Keystones #1 · Five questions · Open this day only

  1. 1. Number

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra

    Solve: 6x - 15 = 15

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 9cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 12.04cm
  4. 4. Ratio

    Divide 98 in the ratio 2:1:4

    Answer: 28, 14 and 56
  5. 5. Statistics

    Calculate the mean of: 42, 28, 21, 42, 25, 35, 31

    Answer: 32